Posted by **Heather** on Monday, August 23, 2010 at 9:59pm.

By throwing a ball at an angle of 50 degrees, a girl can throw it a maximum horizontal distance of R = 38 m on a level field.

(a) How far can she throw the same ball vertically upward? Assume that her muscles give the ball the same speed in each case.

(b) Is this assumption valid?

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